This is a good filler: it's undemanding, easy to grow and useful for bulking out the salad bowl. It is useful in that it does not need high light levels and tolerates low temperatures, and so can be sown up until the end of October outside; it can be picked until December or into the new year with some fleece or milder weather. It can be a cut and come again or left as a singleton. If you are short of space, you could broadcast some in between your spring cabbage plants. Seeds of Italy () offers Verte de Cambrai and D'Olanda; T&M offers Cavallo.